134 ROSALES 



2. Aragalus sericeus (Xutt.) Greene. Loco-Weed. 

 Prairies in the western part of the state. Belmont; Pine Ridge: 

 Scotts Bluff County. 



3. Aragalus multiceps (Xutt.) Kuntze. 



Rare in the western part of the state. Banner County; Kimball 

 County. 



13. Homalobus. 554. 



Plowers in spike-like racemes on axillary or scape-like peduncles. 



Leaves pinnat.e, leaflets 11-22, flowers yellowish-white. 



1. H. tenellus. 



Leaves simple or 3-5 foliate, flowers purple. 3. H. caespitosus. 



Flowers clustered in the axils, nearly sessile. 2. H. montanus. 



1. Homalobus tenellus (Pursh.) Britton. 



In dry soil in the western part of the state. Scotts Bluff County; 

 Sioux County. 



2. Homalobus montanus (Nutt.) Britton. 



Hills and bad-lands of the western part of the state. Belmont; Chey- 

 enne County. 



3. Homalobus caespitosus Xutt. 



On dry hills and cliffs in the western part of the state. Banner 

 County; Belmont; Harrison. 



14. Phaca. 553. 



1. Phaca longifolia (Pursh. Xutt. 



Common in sandy soil in the western part of the state. Banner 



County; Kennedy; Sioux County; Thedford; Valentine; War Bonnet 



Canon. 



15. Orophaca. 555. 



Flowers yellowish, sessile in the axils. 



Corolla glabrous outside; calyx teeth about half as long as the tube. 



1. O. caespitosa. 



Corolla pubescent on the outside; calyx teeth nearly as long as the 



tube. 2. O. argophylla. 



Flowers purplish; in peduncled axillary racemes. 3. O. sericea. 



1. Orophaca caespitosa (Xutt.) Britton. 



Dry hills in the western part of the state. Banner County; Belmont; 

 Ft. Robinson; Kimball County. 



2. Orophaca argophylla (Nutt.) Rydb. 



In dry soil in the western part of the state. Cheyenne County; Deuel 

 County. 



'3. Orophaca sericea (Xutt.) Britton. 



In dry sandy or rocky places in the western part of the state. Alli- 

 ance; Belmont. 



